4-3
Section
CPM2A/CPM2C Communications Functions
242
Response Codes
End
code
Contents
Probable cause
Corrective measures
00
Normal completion
---
---
01
Not executable in RUN mode
The command that was sent can-
not be executed when the PC is in
RUN mode.
Check the relation between the
command and the PC mode.
02
Not executable in MONITOR mode
The command that was sent can-
not be executed when the PC is in
MONITOR mode.
04
Address over
The user program area’s highest
address was exceeded.
Check the program.
0B
Not executable in PROGRAM
mode
The command that was sent can-
not be executed when the PC is in
PROGRAM mode.
This code is not presently being
used.
13
FCS error
The FCS is wrong. Either the FCS
calculation is mistaken or there is
adverse influence from noise.
Check the FCS calculation method.
If there was influence from noise,
transfer the command again.
14
Format error
The command format is wrong.
Check the format and transfer the
command again.
15
Entry number data error
The read/write area specification is
wrong.
Correct the areas and transfer the
command again.
16
Command not supported
The specified command does not
exist in the specified address.
(Reading the SV, etc.)
Check the address and instruction.
18
Frame length error
The maximum frame length was
exceeded.
Divide the command into multiple
frames.
19
Not executable
Items to read not registered for
composite command (QQ).
Execute QQ to register items to
read before attempting batch read.
23
User memory write-protected
The memory is write-protected in
the PC Setup.
Change the setting in the PC Setup
(DM 6602).
A3
Aborted due to FCS error in trans-
mit data
The error was generated while a
command extending over more
f
Check for corrupted frames, correct
if necessary, and try the transfer
A4
Aborted due to format error in
transmit data
co
a d e e d g o e
o e
than one frame was being
executed.
ecessa y, a d y
e a s e
again.
A5
Aborted due to entry number data
error in transmit data
Note:
The data up to that point has
already been written to the ap-
propriate area of the CPU Unit
A8
Aborted due to frame length error
in transmit data
y
propriate area of the CPU Unit.
Other
---
Influence from noise was received.
Transfer the command again.
Application Procedure
Setting the CPU Unit’s
communications switch
Set the CPM2A CPU Unit’s communications switch
or the CPM2C CPU Unit’s DIP switch.
Connecting the cables
Make the 1:1 or 1:N connection.
Commands issued from the host
computer.
Ladder program
(Communications initiated by
CPM2A/CPM2C)